I've heard the Piega C-40s and they sound pretty much like you described - very detailed and somewhat thin sounding. I think you would be happier with warmer sounding speakers. Your electronics are quite good. I don't think you need to do anything there. You could also probably do better than the Audio Tekne ICs.
Try speakers from Vienna Acoustics, Vandersteen, Soliloquy, Aerial, Avalon, and Sonus Faber. All of these are available for audition in a day trip from central NC. I live in VA and know your problem. You just have to be willing to travel a bit. Robert Taylor (Taylor House) in Sherrills Ford, NC is a good dealer. Audio Art in Richmond,VA is another. JS Audio in Bethesda, MD and Gifted Listener in Centerville, VA are a little further away, but also worth the trip.
Try speakers from Vienna Acoustics, Vandersteen, Soliloquy, Aerial, Avalon, and Sonus Faber. All of these are available for audition in a day trip from central NC. I live in VA and know your problem. You just have to be willing to travel a bit. Robert Taylor (Taylor House) in Sherrills Ford, NC is a good dealer. Audio Art in Richmond,VA is another. JS Audio in Bethesda, MD and Gifted Listener in Centerville, VA are a little further away, but also worth the trip.